I am and am not surprised something like this was released so early. Clinton would want to stop Trump from skating along through everything thrown at him since Monday before last, and shock drops on her have started and will continue.
Thing is, on one hand it's preaching to the choir. Dems and NeverTrumpers will be scolding, but. . . they're out of the picture. The first step almost anyone takes in declaring for Trump is acknowledging that he's an ass, and the rest will rationalize. This isn't Ted Cruz. This is the guy who has had multiple wives and puts his name on everything. And it's oldish at 11 years, which doesn't make it irrelevant but does make people think back in their own lives to when they've heard this talk before. And how it's just kind of a thing unless you're sheltered.
Also - surely Clinton realizes this? - her husband changed the paradigm about personal and political life with the Lewinsky scandal. At best, Bill is seen by the public as "that lovable hillbilly horndog," and at worst has a floating rap sheet for sexual violence. So her "This man cannot be president" tweet signature on the release either assumes people have no memory or reveals she didn't think this through. Trump's as teflon as Bill, and Michael Moore was right - a lot of voters want somebody, anybody to be a battering ram (Molotov per Moore) aimed at D.C.
When Trump actually prepares, he's got a good memory. If he's been pushed, Sunday could see an exhaustive list of assault claimants and encounters tossed into public discourse in a way no GOPer ever has, and Clinton's reflexive "save me, entourage" automaton smile. Conversation probably shifts hard away Monday.